Backflow Preventer Test Kit - $489.00
http://www.backflowgage.com/catalog.0.html



"Mikepier" wrote in message
I have this vacuum breaker on my sprinkler system. What are the 2
small valves on the side for? Can you hook up an air hose to it to
blow it out?
Also do I have to remove the guts during winter?


http://www.cjjstore.com/store/images...reakoutmed.gif